Maybe I am too new, but I found Dragonpunch's instruction quite confusing. It is a Right, a Down, a Right-Down. But how do you perform this with a PS3 analog stick or joystick?

What is the best way to do this? I don't know how you do it, but here is 2 thought of mine:

1) Right, move the stick back the center, Down, and Right-Down.

2) Right, move straigt to Down, then Right-Down. I suspect it will trigger a Right-Down while moving to Down. I use this method to do it. Am I wrong? Is this why I fail to perform Dragonpunch so often?

The motions are actually a bit more simplified in SF4. Although it's listed as F,D,DF, you can actually just do DF,D,DF as a shortcut. Especially helpful if you have a square-gate stick.

So to do the motion, you can just hold Down+Forward, swing over to Down, then swing back to Down+Forward and punch. On a square-gate, it's pretty much Down+Forward, tap Backward (still pulling downward) and Forward then punch.

Otherwise if you have a round- or octagon-gate stick, you'll just have to get used to the motions. You can still use the shortcut, it's just a heck a lot easier to do with a square-gate.